TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 515: Practices for Preventing Roadway Departures identifies and summarizes practices being used by state departments of transportation (DOTs) to prevent roadway departure crashes and to identify the data-driven advantages and disadvantages of these practices. More than half of all traffic fatalities result from roadway departure crashes. This type of crash occurs after a vehicle crosses an edge line or centerline or otherwise leaves th...

TRB's Transportation Research Record: Journal of the Transportation Research Board has released more than 200 papers from the 2018 TRB Annual Meeting. Enhancements to the journal include:  Articles published much closer to final acceptance A new user interface for the journal Article-level metrics  Full-text HTML to enhance discovery of the research Interactive proof markup for authors LaTeX support for complex math articles (LaTeX is a typesetting system that includes features designed for the...

TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 251: Spot Painting to Extend Highway Bridge Coating Life: Volume 1: Guidance provides approaches for employing spot painting in a cost-effective, safe, and environmentally compliant manner. Bridge coatings are the primary means of corrosion protection for steel bridges in the United States. Most bridge coatings tend to fail prematurely in localized areas and spot painting can be used restore the lost corrosion protection and ex...

TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 251: Spot Painting to Extend Highway Bridge Coating Life: Volume 1: documents the evaluation method for a guidance document that provides approaches for employing spot painting in a cost-effective, safe, and environmentally compliant manner. Bridge coatings are the primary means of corrosion protection for steel bridges in the United States. Most bridge coatings tend to fail prematurely in localized areas and spot painting can ...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 871: Long-Term Aging of Asphalt Mixtures for Performance Testing and Prediction presents a proposed standard method for long-term laboratory aging of asphalt mixtures for performance testing. The method is intended for consideration as a replacement for the method in AASHTO R 30, “Mixture Conditioning of Hot Mix Asphalt (HMA),” which was the most commonly used method for aging asphalt materials for performance testing for input t...

To keep pace with accelerating rate of research distribution, the Transportation Research Record: Journal of the Transportation Research Board is now publishing articles as soon as they are finalized. The latest papers to be published are as follows: Use of a Laser Diffractometer to Obtain the Particle Size Distribution of Fine-Grained Soils Interstate Speed Profiles Conditioning and Testing Protocol Combinations to Detect Asphalt Mixture Damage Safety Evaluation of the SafetyEdge Treatment for Pavement ...

TR Circular E-C228: Rebuilding and Retrofitting the Transportation Infrastructure documents the presentations from a conference of the same name held in Washington, D.C., in September 2017. This meeting was the 11th in a series of Spotlight Conferences funded by the U.S. Department of Transportation’s (DOT) Office of the Assistant Secretary for Research and Technology, University Transportation Centers (UTC) Program. This event provided an opportunity to share ideas and needs about transportation infrast...

TRB's National Cooperative Highway Research Program (NCHRP) latest Research Topic Highlights explores solutions for roadway tunnels. It summarizes the results of several research projects that has framed the problems and mitigation strategies associated with tunnels. Included are summaries of tunnel inspection, rehabilitation, and preservation; tunnel design; and tunnel safety and security.

The full edition of the July–August 2017  TR News  magazine is now available.  Moving research into practice is the theme of feature articles in this edition. Authors describe today’s successes, present a systematic approach that has proved effective at a state department of transportation, describe federal programs encouraging innovations at the state level, discuss initiatives by research programs to promote and document the implementation of results, and offer insights on technology tra...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 863: Material Properties of Cold In-Place Recycled and Full-Depth Reclamation Asphalt Concrete  presents procedures for determining material properties of cold-recycled asphalt mixtures for input to pavement structural design programs. Highway agencies are placing increasing emphasis on sustainability, recycling, and making maximum use of existing pavement assets in rehabilitation strategies. Such emphasis has led agencies t...